In surface mining, the miners use tunnels to extract ore minerals.

Dredging is a type of surface mining that involves the removal of thin strips of overburden to extract the desired deposits.

There are harmful effects on health in underground mining including the development of black lung disease.

Surface mining has no negative impact on the environment.

It involves the separation of valuable materials from raw materials.

This is the removal of a portion that represents a whole need for the analysis of this material.

This process begins by crushing the ores to a particular size and finishes it by grinding the ores into a powder form.

It uses concentration to convert it to usable minerals.

It is important to evaluate the valuable component in an ore.